How do you select one of several meshes created in edit mode
In edit mode select any vertex, edge or face of the torus, then use Ctrl+L to select linked. All of the vertices (edges or Faces) of the torus will be selected, and given that the cube and the torus are not linked, or don't share any common vertices, none of the geometry of the cube will be selected.

If at that point you want to turn the selected vertices as a new object you can press P and choose separate selected. A new object will be created and can be transformed independently.

What you call "tree view" is the outliner window. To understand the difference between objects created in edit mode and those created in Object mode please read:   Why can&#39;t objects in Edit Mode have their own name?

If you are just starting using blender I recommend that you read trough the links on the following page: Resources for Blender